Reading from a file and writing to StringIO - Python

Question

I'm using Box Python API to write some tools. Therefore, one of them is to upload a file to Box. They use a StringIO as the object file. I need to read a file locally and write its content to the StringIO buffer, then pass that to the Box API as shown in the code below:

def upload_file(self, filename, folder_id='0'):
    assert self.client is not None
    try:
        stream = StringIO.StringIO()
        # replace this line a file read
        stream.write('Box Python SDK Test!')
        stream.seek(0)
        box_file = self.client.folder(folder_id=folder_id).upload_stream(
                                                        stream, filename,
                                                        preflight_check=True)
        return box_file.name
    except BoxAPIException, e:
        self.log.exception(e)

Simple enough, how can I read from a local file, and then write to the StringIO buffer?

If you really need a StringIO (likely the file object will do), just do stream.write(open(filename).read()). — tdelaney
– tdelaney, Commented Dec 14, 2015 at 22:31

Mike Müller · Accepted Answer · 2015-12-14 22:27:52Z

5

You should be able to supply an open file instead of as StringIO instance. This should do:

stream = open('mylocal_file')

answered Dec 14, 2015 at 22:27

Mike Müller

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